The body escánares at airports have been one of the most controversial decisions in aviation safety in recent years. A study by the University of Arizona is adding fuel to the fire and ensuring that more deaths may occur due to radiation, a terrorist attack. Scientists at the University of Arizona have claimed that the probability of dying from the radiation of a whole body scan and a terrorist attack are the same: one in 30 million. Experts say that the beam emitted by the scanner is low and offers a small dose of radiation in the body but because the beam is concentrated in the skin, one of the most sensitive organs to radiation from the human body, dose may be 20 times higher than previously estimated. Even more worrying radiation machines when they are damaged when they are in operation as "a failure in the device could increase the dose of radiation," says one of the scientists involved in the study, Peter Rez. Perez, along with the rest of scientists has studied the radiation dose from the scans using the images produced by them and says not really "there are arguments to continue incorporating these types of machines in airports. " Such devices create an image of the entire body is connected to a computer in a private room. Collect all the natural curves of the human body to detect whether the passenger is in possession of weapons or drugs at the time of boarding. . . 50% of radiation comes from the environment from various sources: space, radioactive minerals in the soil and foods. Even your own body produces radiation! The other half comes from medical tests and treatments as x-rays, according to the EPA. Everyday we receive from sources you never think of even nature itself. The effect of radiation on the body are measured in mSv (milisevert) or mrem (millirem). According to "Environmental Protection Agency" (EPA), a person receives about 620 millirem per year or 6. 2 miliseverts in the United States. 50% of radiation comes from the environment from various sources: space, radioactive minerals in the soil and foods. Even your own body produces radiation! The other half comes from medical tests and treatments as x-rays, according to the EPA. Perature affects the levels of radiation. This means that as you gain height, also increases the level of radiation. The people in Denver are more than those living in Chicago is lower. A long flight from Los Angeles to New York provides between 2-5 mrem (0. 02 to 0. 05 mSv). The TSA has installed 78 new 450 body scanners at airports. However, the controversial scanner 'backscater', which produces x-ray images of passengers almost naked, it emits about 0. 005 mrem. That is, 1 / 1000 of generating a plaque. From your TV to your microwave, all appliances emit radiation. Despite the myths about microwave ovens, the EPA says that if you are in perfect condition, does not emit enough radiation to cause any damage. Most Americans get at least a year to detect X-ray for illness and injury. An X-ray produces between 5 and 10 mrem (. 05 -. 1 mrem), a quantity completely safe, but can affect pregnant women. For the baby to suffer any risk, a pregnant woman has to make at least 500 chest radiographs. Thus, the child will have a 2% chance of suffering some type of cancer, according to the Centers for Disease Control and Prevention (CDC). The limit of radiation that can receive a worker in a nuclear plant like Fukushima is 5,000 mrem (50 mSv) per year according to the rules of the Nuclear Regulatory Commission U. S. Since the nuclear crisis began after the earthquake, workers at the plant have been getting a dangerous amount of radiation. Workers and area residents were evacuated when the radiation levels reached 4 mrem per hour (400 mSv). For the World Health Organization (WHO), exposure to 1000. 000 mrem (1. 000 mSv) and can cause acute radiation sickness. Symptoms include, in principle, redness, burns and hair loss. A dose of 1000. 000 mrem (1. 000 mSv) increases the risk of cancer by 40% until several years after the event. The most common types of cancer from radiation, thyroid and bone marrow (leukemia), according to the American Cancer Society. Also: skin cancer, breast and stomach. A dose of 400,000 mrem (400 mSv) is able to kill 50% of those exposed. Any amount greater than 600,000 mrem (600 mSv) causes immediate death to 100% of the people. Such was the level that was recorded when the bomb on Hiroshima, Japan, in World War II. . . .